chore: rewrite an outdated comment

[Golovanov399]

This resolves INT-3660.

The comment is outdated since we deserialize stuff from the input stream differently in ZKVM.

[github-actions]

group	app.proof_time_ms	app.cycles	app.cells_used	leaf.proof_time_ms	leaf.cycles	leaf.cells_used
verify_fibair	(-7 [-0.6%]) 1,231	334,086	17,903,104	-	-	-
fibonacci_program	(+31 [+1.2%]) 2,722	1,500,096	51,485,167	-	-	-
regex_program	(+161 [+2.1%]) 7,991	4,140,164	167,389,450	-	-	-
ecrecover_program	(-18 [-1.2%]) 1,442	295,291	15,598,160	-	-	-
pairing	(-19 [-0.4%]) 4,715	1,711,640	92,620,923	-	-	-

Commit: cb0b36a

Benchmark Workflow